THE MAXILLIPEDES. 165 
with two terminal divisions (ip to dp, and ex), which are 
directed forwards, below the mouth, and a third, lateral 
appendage (e, br), which runs up, beneath the carapace, 
into the branchial chamber. The latter is the gill, or podo- 
branchia, attached to this limb, and it is something not 
represented in the abdominal limbs. But, with regard 
to the rest of the maxillipede, it is obvious that the 
basal portion (cxp, bp) represents the protopodite, and 
the two terminal divisions the endopodite and the exo- 
podite respectively. It has been observed that, in the 
abdominal appendages, the extent to which segmentation 
occurs in homologous parts varies indefinitely; an endo- 
podite, for example, may be a continuous plate, or may 
be subdivided into many joints. In the maxillipede, the 
basal portion is divided into two joints; and, as in the 
abdominal limb, the first, or that which articulates with 
the thorax, is termed the coxopodite (cap), while the second 
is the basipodite (bp). The stout, leg-like endopodite 
appears to be the direct continuation of the basipodite ; 
while the much more narrow and slender exopodite arti- 
culates with its outer side. The exopodite (ex) is by no 
means unlike one of the exopodites of the abdominal 
limbs, consisting as it does of an undivided base and a 
many-jointed terminal filament. The endopodite, on the 
contrary, is strong and massive, and is divided into five 
joints, named, from that nearest to the base onwards, 
ischiopodite (ip), meropodite (mp), carpopodite (cp), propo- 
dite (pp), and dactylopodite (dp). 
